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Mastering Multi Table Queries

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Questions and Answers

Which of the following is NOT a method for combining multiple datasets from different databases in multi-table queries?

VLOOKUP (correct)

Join

Subquery

Matching keys

What is the purpose of a subquery in multi-table queries?

To retrieve data from one table based on data from another table(s) (correct)

To retrieve data from multiple tables at the same time

To test a given condition using matching columns

To connect multiple queries using parentheses

What is the function of the JOIN operator in multi-table queries?

To test a given condition using matching columns

To retrieve data from one table based on data from another table(s)

To connect multiple queries using parentheses

To retrieve data from multiple tables at the same time (correct)

Which attribute(s) are used to organize and store business data?

Both business functions/regions and data confidentiality Signup and view all the answers

What is the purpose of the VLOOKUP function in MS Excel?

To retrieve data from one table based on data from another table(s) Signup and view all the answers

What is the main difference between IN and EXISTS in SQL?

IN scans all records fetched from the given subquery column, while EXISTS evaluates a Boolean statement Signup and view all the answers

When is the EXISTS clause typically used in a SQL query?

With WHERE clause Signup and view all the answers

What does the EXISTS clause return if the subquery returns any rows?

True Signup and view all the answers

Mastering Multi Table Queries

Choose a study mode

Podcast

Questions and Answers

Which of the following is NOT a method for combining multiple datasets from different databases in multi-table queries?

What is the purpose of a subquery in multi-table queries?

What is the function of the JOIN operator in multi-table queries?

Which attribute(s) are used to organize and store business data?

What is the purpose of the VLOOKUP function in MS Excel?

What is the main difference between IN and EXISTS in SQL?

When is the EXISTS clause typically used in a SQL query?

What does the EXISTS clause return if the subquery returns any rows?

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